CN102577357A - Radio frequency front end and spectrum sensor - Google Patents
Radio frequency front end and spectrum sensor Download PDFInfo
- Publication number
- CN102577357A CN102577357A CN2010800376679A CN201080037667A CN102577357A CN 102577357 A CN102577357 A CN 102577357A CN 2010800376679 A CN2010800376679 A CN 2010800376679A CN 201080037667 A CN201080037667 A CN 201080037667A CN 102577357 A CN102577357 A CN 102577357A
- Authority
- CN
- China
- Prior art keywords
- radio
- frequency
- frequency front
- tuner
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H40/00—Arrangements specially adapted for receiving broadcast information
- H04H40/18—Arrangements characterised by circuits or components specially adapted for receiving
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/005—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
- H04B1/0064—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with separate antennas for the more than one band
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0264—Arrangements for coupling to transmission lines
- H04L25/0278—Arrangements for impedance matching
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/426—Internal components of the client ; Characteristics thereof
- H04N21/42607—Internal components of the client ; Characteristics thereof for processing the incoming bitstream
- H04N21/4263—Internal components of the client ; Characteristics thereof for processing the incoming bitstream involving specific tuning arrangements, e.g. two tuners
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/61—Network physical structure; Signal processing
- H04N21/6106—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network
- H04N21/6112—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network involving terrestrial transmission, e.g. DVB-T
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H2201/00—Aspects of broadcast communication
- H04H2201/60—Aspects of broadcast communication characterised in that the receiver comprises more than one tuner
Abstract
A radio frequency front end for a television band receiver and spectrum sensor includes a first plurality of adaptive matching networks connected to a signal summer that combines signals received by the first plurality of antennas respectively connected to the first plurality of adaptive matching networks and outputs a combined signal to each of a second plurality of downconverter/tuners. The downconverter/tuners are respectively or collectively connected to an analog to digital converter that converts output of the second plurality of downconverter/tuners into at least one digital signal that is output to the television band receiver and spectrum sensor.
Description
Invention field
The present invention relates generally to a kind of cognitive radio, relate in particular to a kind of radio-frequency front-end that is used for television band receiver and spectral sensor, it confirms the blanking bar (clear area) in the VHF/UHF TV band spectrum.
Background of invention
By unwarranted TV band device use develop untapped TV band spectrum and caused demand the TV band spectrum of the clear area in can Dynamic Recognition VHF/UHF TV band spectrum.
Clear area in the sensing VHF/UHF TV band spectrum is an important problem for the operation of unwarranted TV band device.To the leading operator that authorizes for example DTV broadcaster and wireless microphone operator's protection ratify by Federal Communications Committee (FCC).It is quite strict that the sensing that FCC ratified requires, and requires the TV band device to be provided the information of the quality of relevant obtainable clear area, uses this clear area efficiently to allow the TV band device.Because the sensing critical value of FCC strictness was (114dB), so realized originally with rational one-tenth that the TV band spectrum of the obtainable clear area of sensing was to have challenging task.Existing technology cheaply, for example standard television is tuning, can not satisfy FCC sensing critical value.
Therefore need a kind of radio-frequency front-end that is used for television band receiver and spectral sensor, be used for discerning the clear area of VHF/UHF TV band spectrum.
Summary of the invention
Therefore, the purpose of this invention is to provide a kind of radio-frequency front-end that is used for television band receiver and spectral sensor, with the clear area in the identification VHF/UHF TV band spectrum.
Therefore, the invention provides a kind of radio-frequency front-end that is used for television band receiver and spectral sensor, it comprises: more than first adaptive matching networks that is suitable for being connected respectively to the corresponding antenna in more than first antenna; Be connected to more than second down converter/tuner of said more than first adaptive matching networks; And at least one analog to digital converter that the output of said more than second down converter/tuner is converted to digital signal.
The present invention also provides a kind of adaptive matching networks that is used for radio-frequency front-end, and it comprises: the impedance inverter circuit that is suitable for one impedance conversion in more than first antenna is become corresponding different impedance; Be controlled to decay by the pin diode attenuator of the strong signal of the said reception in said a plurality of antennas; The signal band of being paid close attention to that suppresses to receive is diverted to the antiresonant circuit of ground connection; And the series resonant circuit that promotes the signal band of being paid close attention to that receives.
The present invention also provides a kind of radio-frequency front-end that is used for television band receiver and spectral sensor in addition, and it comprises: at least two adaptive matching networks that are suitable for being connected respectively to corresponding antenna; Combined reception to by the signal of said at least two adaptive matching networks output and export the signal adder of composite signal; Receive at least two down converter/tuners of said composite signal respectively; And one output at least two corresponding down converter/tuners of general converts at least two analog to digital converters of the digital signal that passes to said television band receiver and spectral sensor respectively to.
The present invention also provides a kind of radio-frequency front-end that is used for television band receiver and spectral sensor, and it comprises: at least two antennas; Signal that combination is received by said two antennas at least and first signal adder of exporting composite signal; Receive at least two down converter/tuners of said composite signal respectively; Each output in said at least two down converters/tuning is combined into the secondary signal adder of the tuner signal of combination; And the analog to digital converter that the tuner signal of said combination is converted to the digital signal that passes to said television band receiver and spectral sensor.
The present invention also provides a kind of method of clear area of sensing television band, and said method comprises: each in dynamically tuning more than first antenna is optionally to receive the intended fragment in the TV band spectrum; With the fragment delivery in the TV band spectrum to more than second the down converter/tuner that receives the fragment in the TV band spectrum; Convert each the output in said more than second down converter/tuner to digital signal; And give spectral sensor with said digital signal transfers, said spectral sensor is searched the clear area in the said digital signal.
The accompanying drawing summary
After having described character of the present invention so prevailingly, at present will be with reference to accompanying drawing, wherein:
Fig. 1 a is the sketch map according to an embodiment of radio-frequency front-end of the present invention, and it is used for the television band receiver that provides with transducer, with identification television band clear area;
Fig. 1 b is the sketch map according to another embodiment of radio-frequency front-end of the present invention, and it is used for the television band receiver that provides with transducer, with identification television band clear area;
Fig. 2 is the sketch map according to another embodiment of radio-frequency front-end of the present invention, and it is used for the television band receiver that provides with transducer, with identification television band clear area;
Fig. 3 is the sketch map according to another embodiment of radio-frequency front-end of the present invention, and it is used for the television band receiver that provides with transducer, with identification television band clear area;
Fig. 4 is the sketch map according to another embodiment of radio-frequency front-end of the present invention, and it is used for the television band receiver that provides with transducer, with identification television band clear area;
Fig. 5 is the sketch map according to another embodiment of radio-frequency front-end of the present invention, and it is used for the television band receiver that provides with transducer, with identification television band clear area;
Fig. 6 is the sketch map according to another embodiment of radio-frequency front-end of the present invention, and it is used for the television band receiver that provides with transducer, with identification television band clear area;
Fig. 7 is the sketch map that is shown in an execution mode of the radio-frequency front-end among Fig. 5; And
Fig. 8 is the sketch map of an execution mode that is shown in the adaptive matching networks of the radio-frequency front-end among Fig. 7.
Description of Preferred Embodiments
The invention provides a kind of radio-frequency front-end that is used for the television band receiver, it is provided with television band receiver and spectral sensor, with identification television band clear area.Radio-frequency front-end has at least two antenna self-adaptive matching networks, and each network all is connected to corresponding antenna.Adaptive matching networks is connected to signal adder jointly, and this signal adder is combined into composite signal with the output of each adaptive matching networks, and this composite signal is assigned to two or more parallelly connected down converter/tuners (DC/ tuner).Control each DC/ tuner to select the different fragments of composite signal.The intermediate frequency of each DC/ tuner output can be fed to corresponding modulus (A/D) transducer or combination and present to independent A/D converter.The digital signal of A/D converter output is delivered to television band receiver and spectral sensor, and it discerns the television band clear area in the selected wavelength coverage.
Fig. 1 a is that it is provided with television band receiver and spectral sensor 56 according to the sketch map of the embodiment of the radio-frequency front-end 20a that is used for the television band receiver of the present invention, to discern the television band clear area.According to the present invention, radio frequency (RF) front end 20a is connected to a plurality of antenna 30a-30n.As the quantity that it is understood by one of ordinary skill in the art that antenna 30a-30n depends on the scope with the frequency spectrum of being searched the clear area, can be the whole or any part of 50-700MHz scope.In addition as the type that it is understood by one of ordinary skill in the art that each antenna 30a-30n and configuration all based on frequency spectrum of being paid close attention to and design alternative, as will be with reference to figure 7 explanation in more detail below.
Each antenna 30a-30n is connected to the corresponding adaptive matching networks 40a-40n of RF front end 20.Each adaptive matching networks 40a-40n can pass through RF front-end control 58, uses holding wire 60a-60n, come optionally and dynamically be tuned to expected frequency in the receiver scope of respective antenna 30a-30n, explain in more detail with reference to figure 8 as following.58 pairs of indications that receive from television spectrum transducer 56 of RF front-end control are responded, and this can realize with the arbitrary method in many methods known in the art.TV band spectrum transducer 56 is not within the scope of the invention.
Output from each adaptive matching networks 40a-40n is delivered to automatic gain controller (AGC) and low noise amplifier (LNA) circuit 42a-42n via corresponding connection 41a-41n.Like what below will further explain with reference to figure 7; The purposes of AGC/LNA circuit 42a-42n is the signal that the corresponding antenna 30a-30n of balance is received, so that weak signal (for example wireless microphone and other narrow band signals) is not flooded by strong signal (for example being close to the DTV broadcasting that RF front end 20 produces).Automatic gain controller is adjusted through automatic gain Control Critical voltage, and this voltage offers AGC/LNA circuit 42a-42n through RF front-end control 58 via correspondent control circuits 62a-62n, like what also will explain in more detail below with reference to figure 7.The output of each AGC/LNA circuit 42a-42n is delivered to signal adder (combiner) 44 via corresponding connection 43a-43n, and this can for example be embodied as resistor network well known in the art.The signal of combination outputs to a plurality of down converter/tuners (DC/ tuner) 48a-48m via corresponding connection 46a-46m.The quantity of DC/ tuner 48a-48m does not rely on the quantity of adaptive matching networks 40a-40n, and does not require corresponding one by one between the two.In one embodiment of the invention, DC/ tuner 48a-48m is can be from the DTV tuner integrated circuit (IC) of Infineon Technologies AG with Part No. TUA-8045 acquisition.
Each DC/ tuner 48a-48m is controlled via connecting 64a-64m by RF front-end control 58, with select (be tuned to) generally have a specific RF frequency of about 6-8MHz bandwidth.Each DC/ tuner 48a-48m is instructed the RF frequency of selecting by TV band spectrum transducer 56, and is sent to DC/ tuner 48a-48m through RF front-end control 58 via signal connection 62a-62n.DC/ tuner 48a-48m downconverts to the RF frequency and is suitable for digitized intermediate frequency (IF) with mode well-known in the art.The IF of DC/ tuner 48a-48m output guides to modulus (A/D) transducer 52a-52m via corresponding connection 50a-50m.IF is taken a sample with predetermined sampling rate (generally be ATSC symbol rate 24 times) by corresponding A/D converter 52a-52m, and to produce the numeral of IF signal, it outputs to TV band spectrum transducer 56 via corresponding connection 54a-54m.
Fig. 1 b is the sketch map according to another embodiment of radio-frequency front-end 20b of the present invention.In this embodiment, down converter/quantity of tuner 46a-n equals the quantity of adaptive matching networks 40a-n.Therefore, do not need above signal adder 44, and between each AGC/LNA circuit 42a-42n and corresponding down converter/tuner 48a-48n, direct connection is arranged with reference to figure 1a description.In addition, radio-frequency front-end 20b is equal to above with reference to the described radio-frequency front-end of figure 1a.Should understand; Although this structure is not the repetition below with reference to the described every kind of embodiment of Fig. 2-6; But the arbitrary embodiment in those embodiments all can be fabricated by what show among Fig. 1 b; As long as the quantity of down converter/tuner equals the quantity of adaptive matching networks, and therefore equal to be connected to the quantity of the antenna of RF front end.
Fig. 2 is the sketch map according to another embodiment of radio-frequency front-end 22 of the present invention.RF front end 22 is equal to above embodiment with reference to figure 1a description; Only the output of DC/ tuner 48a-48m is routed to IF adder (IF combiner) 51 via corresponding connection 49a-49m, and it can be realized with reference to the described signal adder 44 identical modes of figure 1a with above.Combined I F signal is passed to A/D converter 52 via connecting 53, and it is taken a sample to combined I F signal with predetermined sampling rate, and via connecting 54 numerals to TV band spectrum transducer 56 output combined I F signals.
Fig. 3 is the sketch map according to another embodiment of radio-frequency front-end 24 of the present invention.RF front end 24 is equal to above embodiment with reference to figure 1a description; In a plurality of reasons that only determined because of TV band spectrum transducer 56 any one or a plurality of reason can be divided to ground connection (disabled) through corresponding switch 70a-70n from each the output of antenna 30a-30n.Switch 70a-70n is Be Controlled in the following manner: RF front-end control 58 uses the corresponding 72a-72n of connection to apply control voltage with mode known in the art under the guidance of TV band spectrum transducer 56.
Fig. 4 is the sketch map according to another embodiment of radio-frequency front-end 26 of the present invention.RF front end 26 is equal to above embodiment with reference to figure 3 descriptions, and only the output of DC/ tuner 48a-48m is routed to IF signal adder 51 and through A/D converter 52 and is digitized, as above described with reference to figure 2.
Fig. 5 is the sketch map according to another embodiment of radio-frequency front-end 28 of the present invention.RF front end 28 is equal to above embodiment with reference to figure 4 descriptions, the only operation of corresponding D C/ tuner 48a-48m further enhancing of quilt through adding IF filter and IF filter selector 78a-78m.Every group of IF filter receives the IF signal by relevant DC/ tuner 48a-48m output with relevant IF filter selector 78a-78m, and selected IF filter is passed through in the transmission of IF signal, like what below will explain in further detail with reference to figure 7.The IF signal route of filtering is returned DC/ tuner 48a-48m, and it can be further carry out down-conversion to the IF signal before the IF signal be passed to relevant A/D converter 52a-52m, as with reference to figure 1a described above.The IF filter selector uses signal to connect 80a-80m to the selection of suitable IF filter under the guidance of TV band spectrum transducer 56 through RF front-end control 58 and controls.
Fig. 6 is the sketch map according to another embodiment of radio-frequency front-end 32 of the present invention.RF front end 32 is equal to above embodiment with reference to figure 5 descriptions, and only the output of DC/ tuner 48a-48m is routed to IF signal adder 51 and through A/D converter 52 and is digitized, as above described with reference to figure 2.
Fig. 7 is the sketch map of an execution mode that is shown in the radio-frequency front-end 28 of Fig. 5.In this execution mode, RF front end 28 is connected to three antenna 100a, 100b and 100c.Antenna 100a and 100b are discone antenna well-known in the art (disc-cone antenna).For example, antenna 100a can be tuning by dynamically, to receive the signal in the 50MHz-150MHz scope.For example, antenna 100b can be tuning by dynamically, to receive the signal in the 150MHz-350MHz scope.For example, antenna 100c is simple loop aerial, and it can be tuning by dynamically, to receive the signal in the 350MHz-700MHz scope.Corresponding antenna 100a-100c is connected to corresponding balanced-to-unblanced transformer 102a-102c, and it is with antenna output the change unbalanced signal of mode well known in the art with balance.Each balanced-to-unblanced transformer 102a-102c is coupled to the corresponding adaptive matching networks 40a-40c of RF front end 28 via connector 104a-104c.Adaptive matching networks 40a-40c comprises tunable matching network 106a-106c and pin diode attenuator 114a-114c respectively, and the exemplary 26S Proteasome Structure and Function of adaptive matching networks 40a-40c will described below with reference to Fig. 8.
As will explain following with reference to figure 8; By dynamically tuning, the structure of said digital potentiometer and function are known in the art through the control voltage that is applied by digital potentiometer 110 via control line 112a-112c for each is tunable matching network 106a-106c.Digital potentiometer 110 is coupled to data wire (SDA) and the data clock line (SCL) that is coupled in RF front-end control 58 via charge separation device 108.RF front-end control 58 provides data to digital potentiometer 110, offers the control corresponding voltage of tunable matching network 106a-106b with adjustment.To corresponding low noise amplifier (LNA) 116a-116c, it provides the gain of 20-30dB to the output signal from the output stream of adaptive matching networks 40a-40c.The output of corresponding LNA116a-116c feeds back to automatic gain controller (AGC) 120a-120c through corresponding diode 118a-118c, and it relatively feeds back and the AGC critical voltage that applies via control line 126a-126c through digital potentiometer 124.Digital potentiometer 124 passes through to the charge separation device 122 of data wire (SDA) and data clock line (SCL), is coupled to RF front-end control 58.RF front-end control 58 provides data to digital potentiometer 124, to control each AGC critical voltage 126a-126c.Charge separation device 108,122 is isolated control circuit and acceptor circuit, to minimize the electronic noise transmission.Charge separation device 108,124 can for example be an optical isolator well known in the art.AGC 120a-120c depend on the signal that feeds back to through diode 118a-118c and the corresponding AGC critical voltage that applies via control line 126a-126c between power difference; 114a applies control voltage to the pin diode attenuator, so that strong signal is through pin diode attenuator 114a-114c decay.
Output from LNA 116a-116b is made up through signal adder circuit 44, and the example of signal adder circuit is well known in the art.Composite signal is arrived corresponding D C/ tuner (for example DTV tuner IC) 130a-130b via connecting 128a and 128b by parallel feed.As stated, DC/ tuner 130a and 130b for example are the TUA-6045DTV tuner IC of Infineon Technologies.Composite signal is taken a sample downwards by corresponding D C/ tuner 130a, 130b with mode well known in the art, and so that intermediate frequency (IF) signal to be provided, this intermediate-freuqncy signal outputs to corresponding switch to 132a-134a and 132b-134b via corresponding connection 131a and 131b.Switch is controlled via holding wire 136a (tuner filter 1) and 136b (tuner filter 2) respectively through RF front-end control 58 132a-134a and 132b-134b simultaneously, with selection IF filter, or with bypass IF filter.Among this embodiment, switch is one the triple-pole switch that is used for selecting respectively two IF filters 138 or 140 and 142 or 144 to 132a-134a and 132b-134b.The IF filter can be through moving to the center to select corresponding filter by-pass line 135a and 13513 and by bypass to 132a and 134a or 132b and 134b to switch.IF filter 138-11/1 is carried out statically, to leach all signals except institute's selected episode of composite signal, so that reduce the noise among corresponding D C/ tuner 130a and the 130b.Corresponding filter is selected based on the wavelength coverage of being paid close attention to by RF front-end control 58.Although in this exemplary, each among 2 IF filters and DC/ tuner 130a and the 130b is associated, and should be appreciated that, the invention is not restricted to this exemplary execution mode.Output from corresponding switch 134a and 134b is fed back to corresponding D C/ tuner 130a and 130b via being connected 137a and 137b.
The tuber function of each DC/ tuner 130a and 130b receives RF front-end control 58 control via corresponding data wire (SDA) and data clock line (SCL), with corresponding D C/ tuner be tuned to via the particular segment that connects the IF signal that 137a and 137b return.Timing signal by crystal oscillator (XTAL) 152 outputs is used by corresponding D C/ tuner 130a, 130b, is used for the tuber function with mode well known in the art.Output from corresponding D C/ tuner 130a and 130b is delivered to corresponding modulus (A/D) transducer 156a and 156b through corresponding balanced-to-unblanced transformer 154a and 154b, and the corresponding analog-signal transitions that said analog to digital converter is exported DC/ tuner 130a and 130b with mode well known in the art becomes the numeral of output.Digital signal is outputed to TV band spectrum transducer 56, and it is according to known clear area transducer algorithm processing digital signal, to detect the television band clear area.
Fig. 8 is the sketch map of an execution mode that is shown in the adaptive matching networks 40a of the radio-frequency front-end among Fig. 7.Antenna 100a is connected to adaptive matching networks 40a 300.Bypass connector 302 allows adaptive matching networks 40a by bypass.Be used to select output through RF front-end control 58 via the single-pole double-throw switch (SPDT) (SPDTS) 304 of tuner bypass 350 control, as will be in following detailed description from adaptive matching networks 40a or bypass connector 302.
In this embodiment, adaptive matching networks 40a comprises impedance transformer and low pass filter 304, pin diode attenuator 114a, parallel resonance piece 326 and series resonance piece 338.Parallel resonance piece 326 is shown in the tunable matching network 106a among Fig. 5 with series resonance piece 338 common formation.Impedance transformer and low pass filter 304 are that different impedance is used for the maximum signal power transmission with the impedance transition of antenna 100a.Impedance transformer and low pass filter 304 comprise the branch road capacitor 310 of capacitor connected in series 306 and inductor 308 and ground connection, and its each value is all selected with mode as known in the art, with the impedance transition of carry out desired.Pin diode attenuator 114a controls through the control voltage that AGC 120a outputs to control line 121a.Control voltage is applied to resistance 314a, 314b and capacitor/ground connection 316a, the 316b circuit of interconnection, and it is connected respectively to diode 318a and the 318b that stops current direction AGC 120a.Control voltage is applied to the relative terminal of capacitor 320, resistor 322 and inductor 324, and is with the signal that decay or lifting receive, as desired.The output stream of pin diode attenuator 114a is to parallel resonance piece 326, and this parallel resonance piece stops the signal that receives to be diverted to ground connection.
As discussed above, the selection of adaptive matching networks 40a or bypass 302 is received the control of RF front-end control 58, it applies control voltage to being connected to the reverser 352a that is connected in series and the tuner bypass MO of 352b.Reverser 352a is coupled to capacitor 354.When tuner bypass 350 is driven to when low, reverser 352a driver circuit 356 and 358 is a height, and reverser 352b driver circuit 360 is low, and this makes SPDTS 304 that the output of adaptive matching networks 40a is changed into RF_Out 362.When tuner bypass 350 is driven to when high, reverser 352a driver circuit 356 and 358 is low, and reverser 352b driver circuit 360 is high, and this makes SPDTS 304 that the output of bypass 302 is changed into RF_Out 362.Thereby RF front-end control 58 has been given the control fully of adaptive matching networks 40a.
The radio-frequency front-end that the working of an invention scheme of more than describing means according to television band receiver of the present invention and spectral sensor only is exemplary.Therefore, mean that scope of the present invention is only limited by the scope of accompanying claims.
Claims (48)
1. radio-frequency front-end that is used for television band receiver and spectral sensor, it comprises:
More than first adaptive matching networks, it is suitable for being connected respectively to the corresponding antenna in more than first antenna;
More than second down converter/tuner, it is connected to said more than first adaptive matching networks; And
At least one analog to digital converter, its output with said more than second down converter/tuner converts digital signal to.
2. radio-frequency front-end as claimed in claim 1; Also comprise the signal adder that is connected between said more than first adaptive matching networks and said more than second the down converter/tuner, wherein the quantity of adaptive matching networks is different from the quantity of down converter/tuner.
3. radio-frequency front-end as claimed in claim 1 also comprises signal adder, and said signal adder is fed to an analog to digital converter with the output combination of said more than second down converter/tuner and the output that will make up.
4. radio-frequency front-end as claimed in claim 1 also comprises each the antenna that is connected in said more than first adaptive matching networks.
5. radio-frequency front-end as claimed in claim 1, each in wherein said more than first adaptive matching networks comprise pin diode attenuator and the tunable matching network that is connected in series.
6. radio-frequency front-end as claimed in claim 1 also comprises the low noise amplifier that is connected in series between each said adaptive matching networks and the said down converter/tuner.
7. radio-frequency front-end as claimed in claim 6 also comprises the automatic gain controller that is connected in parallel with said low noise amplifier, and said automatic gain controller receives feedback from the output of said low noise amplifier.
8. radio-frequency front-end as claimed in claim 7, wherein said automatic gain controller compares said feedback and the automatic gain Control Critical voltage from said low noise amplifier, and produces AGC voltage.
9. radio-frequency front-end as claimed in claim 8, wherein said AGC voltage are applied to said pin diode attenuator.
10. radio-frequency front-end as claimed in claim 1 also comprises each the intermediate-frequency filter selector of intermediate frequency output that is connected in said down converter/tuner.
11. radio-frequency front-end as claimed in claim 10, wherein said intermediate-frequency filter selector comprises paired switch, is used for selecting of at least two intermediate-frequency filters.
12. radio-frequency front-end as claimed in claim 11 also comprises the intermediate frequency bypass, said intermediate frequency bypass can be selected with said two intermediate-frequency filter bypasses by said paired switch at least.
13. radio-frequency front-end as claimed in claim 11, the output of wherein said intermediate frequency selector are fed back to one in said more than second down converter/tuner that said intermediate frequency selector connected.
14. radio-frequency front-end as claimed in claim 1 also comprises more than first switch, is used for any output of corresponding adaptive matching networks is diverted to ground connection respectively.
15. radio-frequency front-end as claimed in claim 1 also comprises the radio-frequency front-end control of the tuber function of control each in said down converter/tuner.
16. radio-frequency front-end as claimed in claim 15 also comprises the television spectrum transducer that instructs said radio-frequency front-end control.
17. radio-frequency front-end as claimed in claim 1, wherein each said down converter/tuner comprises the DTV tuner integrated circuit respectively.
18. an adaptive matching networks that is used for radio-frequency front-end, it comprises:
Impedance inverter circuit, it is suitable for one impedance conversion in more than first antenna is become corresponding different impedance;
The pin diode attenuator, its strong signal that is controlled to decay by the said reception in said a plurality of antennas;
The signal band of being paid close attention to that antiresonant circuit, its inhibition receive is diverted to ground connection; And
Series resonant circuit, it is used to promote the signal band of being paid close attention to that receives.
19. adaptive matching networks as claimed in claim 17 also comprises bypass circuit, is used to make said impedance inverter circuit, said pin diode attenuator, said antiresonant circuit and said series resonant circuit bypass.
20. adaptive matching networks as claimed in claim 18 also comprises switch, said switch is controlled by radio-frequency front-end, optionally to be transformed into said bypass circuit.
21. a radio-frequency front-end that is used for television band receiver and spectral sensor, it comprises:
At least two adaptive matching networks, it is suitable for being connected respectively to corresponding antenna;
Signal adder, its combination are by the signal that receives of said at least two adaptive matching networks output, and the output composite signal;
At least two down converter/tuners, it receives said composite signal respectively; And
At least two analog to digital converters, it converts one output in said at least two corresponding down converter/tuners to pass to said television band receiver and spectral sensor digital signal respectively.
22. radio-frequency front-end as claimed in claim 21 also comprises each the antenna that is connected in said at least two adaptive matching networks.
23. radio-frequency front-end as claimed in claim 21, wherein each adaptive matching networks comprises:
Impedance inverter circuit, its impedance conversion with antenna becomes different impedance;
The pin diode attenuator, the strong signal that its decay is received by said antenna;
The signal band of being paid close attention to that antiresonant circuit, its inhibition receive is diverted to ground connection; And
The signal band of being paid close attention to that series resonant circuit, its amplification receive.
24. radio-frequency front-end as claimed in claim 23 also comprises radio-frequency front-end control, said radio-frequency front-end control will be controlled voltage and be applied to said antiresonant circuit and said series resonant circuit, with said antenna be tuned to the signal band paid close attention to.
25. radio-frequency front-end as claimed in claim 21 also comprises the low noise amplifier that is connected in series between said adaptive matching networks and the said signal adder.
26. radio-frequency front-end as claimed in claim 25 also comprises the automatic gain controller that is connected in parallel with said low noise amplifier.
27. radio-frequency front-end as claimed in claim 26 also comprises the control line that is connected to said pin diode attenuator, said automatic gain controller applies control voltage to said pin diode attenuator.
28. radio-frequency front-end as claimed in claim 27; Also comprise control line; Said radio-frequency front-end applies automatic gain Control Critical voltage to said control line, and said automatic gain controller uses said automatic gain Control Critical voltage to produce the said control circuit that offers said pin diode attenuator.
29. radio-frequency front-end as claimed in claim 21 also comprises each the intermediate-frequency filter selector of intermediate frequency output that is connected in said at least two down converter/tuners.
30. radio-frequency front-end as claimed in claim 29 also comprises at least two intermediate-frequency filters that are connected to said intermediate-frequency filter selector.
31. radio-frequency front-end as claimed in claim 30; Wherein said intermediate frequency selector comprises paired switch; In the said paired switch first is connected between said intermediate frequency output of said down converter/tuner and each the input in said two intermediate-frequency filters at least, and in the said paired switch second is connected between the intermediate frequency input of output and said down converter/tuner of said two intermediate-frequency filters at least.
32. a radio-frequency front-end that is used for television band receiver and spectral sensor, it comprises:
At least two antennas;
First signal adder, it makes up the signal that is received by said at least two antennas and exports composite signal;
At least two down converter/tuners, it receives said composite signal respectively;
The secondary signal adder, it is combined into each the output in said at least two down converter/tuners the tuner signal of combination; And
Analog to digital converter, its tuner signal with said combination converts the digital signal that passes to said television band receiver and spectral sensor to.
33. radio-frequency front-end as claimed in claim 32 also comprises the adaptive matching networks between each and said first signal adder that is connected in series at least two antennas.
34. radio-frequency front-end as claimed in claim 33, wherein said adaptive matching networks comprises:
Impedance inverter circuit, it becomes different impedance with one impedance conversion in said at least two antennas;
The pin diode attenuator, the said strong signal that receives in said at least two antennas of its decay;
The signal band of being paid close attention to that antiresonant circuit, its inhibition receive is diverted to ground connection; And
The signal band of being paid close attention to that series resonant circuit, its amplification receive.
35. radio-frequency front-end as claimed in claim 34; Also comprise radio-frequency front-end control; The control of said radio-frequency front-end will be controlled voltage and be applied to said antiresonant circuit and said series resonant circuit, with in said at least two antennas said one be tuned to the signal band paid close attention to.
36. radio-frequency front-end as claimed in claim 33 also comprises the low noise amplifier that is connected in series between said adaptive matching networks and said first signal adder.
37. radio-frequency front-end as claimed in claim 36 also comprises the automatic gain controller that is connected in parallel with said low noise amplifier.
38. radio-frequency front-end as claimed in claim 37 also comprises the control line that is connected to said pin diode attenuator, said automatic gain controller applies control voltage to said pin diode attenuator.
39. radio-frequency front-end as claimed in claim 38; Also comprise control line; Said radio-frequency front-end applies automatic gain Control Critical voltage to said control line, and said automatic gain controller uses said automatic gain critical voltage to produce to offer the said control voltage of said pin diode attenuator.
40. radio-frequency front-end as claimed in claim 39 also comprises each the intermediate-frequency filter selector of intermediate frequency output that is connected in said at least two down converter/tuners.
41. radio-frequency front-end as claimed in claim 40 also comprises at least two intermediate-frequency filters that are connected to said intermediate-frequency filter selector.
42. radio-frequency front-end as claimed in claim 41; Wherein said intermediate-frequency filter selector comprises paired switch; In the said paired switch first is connected between one the said intermediate frequency output and each the input in said two intermediate-frequency filters in said down converter/tuner at least, and in the said paired switch second is connected between the output and one intermediate frequency input in said down converter/tuner of said two intermediate-frequency filters at least.
43. the method for the clear area of a sensing television band, it comprises:
In dynamically tuning more than first antenna each is optionally to receive the intended fragment in the TV band spectrum;
With more than second the down converter/tuner of the said fragment delivery in the TV band spectrum to the said fragment that receives the TV band spectrum;
Convert each the output in said more than second down converter/tuner to digital signal; And
Give spectral sensor with said digital signal transfers, said spectral sensor is searched the said clear area in the said digital signal.
44. method as claimed in claim 43 comprises that also said at least two slice groups with the TV band spectrum become composite signal, and said composite signal is passed to each in said more than second down converter/tuner.
45. method as claimed in claim 43; Wherein change each output in said more than second down converter/tuner and comprise using and be directly connected to corresponding one analog to digital converter in each in said more than second down converter/tuner, change each the output in said more than second down converter/tuner.
46. method as claimed in claim 43; Wherein change each output in said more than second down converter/tuner and comprise each the output in said more than second the down converter/tuner of combination, and use single analog to digital converter to change the array output of said more than second down converter/tuner.
47. method as claimed in claim 43 also comprises:
Each intermediate frequency output in said more than second down converter/tuner is delivered to corresponding in corresponding a plurality of intermediate-frequency filter selectors;
Control each in a plurality of intermediate-frequency filter selectors of said correspondence, filter said output to select intermediate-frequency filter;
Said output is transmitted through selected intermediate-frequency filter; And
Output after filtering is turned back to each in corresponding down converter/tuner in said more than second down converter/tuner.
48. method as claimed in claim 43 also comprises:
Automatically the gain of each fragment in the said fragment of control TV band spectrum; And
Before the said fragment delivery of TV band spectrum is returned said more than second down converter/tuner, the gain controlled fragment of amplifying said TV band spectrum.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US12/571,153 | 2009-09-30 | ||
| US12/571,153 US8350970B2 (en) | 2009-09-30 | 2009-09-30 | Radio frequency front end for television band receiver and spectrum sensor |
| PCT/CA2010/001515 WO2011038484A1 (en) | 2009-09-30 | 2010-09-29 | Radio frequency front end and spectrum sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102577357A true CN102577357A (en) | 2012-07-11 |
| CN102577357B CN102577357B (en) | 2014-12-31 |
Family
ID=43779970
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201080037667.9A Expired - Fee Related CN102577357B (en) | 2009-09-30 | 2010-09-29 | Radio frequency front end and spectrum sensor |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US8350970B2 (en) |
| EP (1) | EP2484108A4 (en) |
| JP (1) | JP5770735B2 (en) |
| KR (1) | KR20120090946A (en) |
| CN (1) | CN102577357B (en) |
| HK (1) | HK1170615A1 (en) |
| TW (1) | TW201136303A (en) |
| WO (1) | WO2011038484A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105007085A (en) * | 2014-04-15 | 2015-10-28 | 联发科技股份有限公司 | Receiver apparatus and associated blocker detection method |
Families Citing this family (29)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8583065B2 (en) * | 2007-06-07 | 2013-11-12 | Vishay Intertechnology, Inc. | Digitally controlled antenna tuning circuit for radio frequency receivers |
| US20120052827A1 (en) * | 2010-08-26 | 2012-03-01 | Qualcomm Incorporated | Decision directed antenna diversity in radio frequency receivers |
| US20120275354A1 (en) * | 2011-04-26 | 2012-11-01 | Nxp B.V. | Asymmetric white space communications |
| US10257729B2 (en) | 2013-03-15 | 2019-04-09 | DGS Global Systems, Inc. | Systems, methods, and devices having databases for electronic spectrum management |
| US10271233B2 (en) | 2013-03-15 | 2019-04-23 | DGS Global Systems, Inc. | Systems, methods, and devices for automatic signal detection with temporal feature extraction within a spectrum |
| US8787836B1 (en) | 2013-03-15 | 2014-07-22 | DGS Global Systems, Inc. | Systems, methods, and devices having databases and automated reports for electronic spectrum management |
| US10299149B2 (en) | 2013-03-15 | 2019-05-21 | DGS Global Systems, Inc. | Systems, methods, and devices for electronic spectrum management |
| US10257728B2 (en) | 2013-03-15 | 2019-04-09 | DGS Global Systems, Inc. | Systems, methods, and devices for electronic spectrum management |
| US10257727B2 (en) | 2013-03-15 | 2019-04-09 | DGS Global Systems, Inc. | Systems methods, and devices having databases and automated reports for electronic spectrum management |
| US9078162B2 (en) | 2013-03-15 | 2015-07-07 | DGS Global Systems, Inc. | Systems, methods, and devices for electronic spectrum management |
| US8750156B1 (en) | 2013-03-15 | 2014-06-10 | DGS Global Systems, Inc. | Systems, methods, and devices for electronic spectrum management for identifying open space |
| US8798548B1 (en) | 2013-03-15 | 2014-08-05 | DGS Global Systems, Inc. | Systems, methods, and devices having databases for electronic spectrum management |
| US10231206B2 (en) | 2013-03-15 | 2019-03-12 | DGS Global Systems, Inc. | Systems, methods, and devices for electronic spectrum management for identifying signal-emitting devices |
| US11646918B2 (en) | 2013-03-15 | 2023-05-09 | Digital Global Systems, Inc. | Systems, methods, and devices for electronic spectrum management for identifying open space |
| US10237770B2 (en) | 2013-03-15 | 2019-03-19 | DGS Global Systems, Inc. | Systems, methods, and devices having databases and automated reports for electronic spectrum management |
| US10122479B2 (en) | 2017-01-23 | 2018-11-06 | DGS Global Systems, Inc. | Systems, methods, and devices for automatic signal detection with temporal feature extraction within a spectrum |
| US10219163B2 (en) | 2013-03-15 | 2019-02-26 | DGS Global Systems, Inc. | Systems, methods, and devices for electronic spectrum management |
| US8805292B1 (en) | 2013-03-15 | 2014-08-12 | DGS Global Systems, Inc. | Systems, methods, and devices for electronic spectrum management for identifying signal-emitting devices |
| US10244504B2 (en) | 2013-03-15 | 2019-03-26 | DGS Global Systems, Inc. | Systems, methods, and devices for geolocation with deployable large scale arrays |
| JP2014179846A (en) * | 2013-03-15 | 2014-09-25 | Sony Corp | Receiver and electronic apparatus |
| JP2014187428A (en) * | 2013-03-21 | 2014-10-02 | Fujitsu Ltd | Reception circuit and reception method |
| CN104218958B (en) * | 2013-05-29 | 2017-07-21 | 联芯科技有限公司 | Multimode multi-frequency radio frequency emitter |
| US9369755B2 (en) | 2013-09-09 | 2016-06-14 | New Choices Entertainment Incorporated | Antenna sub-system for receiving multiple digital broadcast television signals |
| US20150156534A1 (en) * | 2013-09-09 | 2015-06-04 | Mark A Gintis | Antenna Sub-system for Receiving Multiple ATSC TV Signals |
| US10700794B2 (en) | 2017-01-23 | 2020-06-30 | Digital Global Systems, Inc. | Systems, methods, and devices for automatic signal detection based on power distribution by frequency over time within an electromagnetic spectrum |
| US10498951B2 (en) | 2017-01-23 | 2019-12-03 | Digital Global Systems, Inc. | Systems, methods, and devices for unmanned vehicle detection |
| US10459020B2 (en) | 2017-01-23 | 2019-10-29 | DGS Global Systems, Inc. | Systems, methods, and devices for automatic signal detection based on power distribution by frequency over time within a spectrum |
| US10529241B2 (en) | 2017-01-23 | 2020-01-07 | Digital Global Systems, Inc. | Unmanned vehicle recognition and threat management |
| US10943461B2 (en) | 2018-08-24 | 2021-03-09 | Digital Global Systems, Inc. | Systems, methods, and devices for automatic signal detection based on power distribution by frequency over time |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006127983A2 (en) * | 2005-05-26 | 2006-11-30 | Pause-Tv, Inc. | Digital television signal reception |
| CN201039094Y (en) * | 2007-05-21 | 2008-03-19 | 杭州中科微电子有限公司 | A high-gain RF low-noise amplifier |
| WO2008049114A1 (en) * | 2006-10-19 | 2008-04-24 | Maxlinear, Inc. | Low complexity diversity receiver |
Family Cites Families (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4520507A (en) * | 1983-10-24 | 1985-05-28 | Zenith Electronics Corporation | Low noise CATV converter |
| US6026129A (en) * | 1996-03-27 | 2000-02-15 | Matsushita Electric Industrial Co., Ltd. | Radio receiving apparatus for receiving communication signals of different bandwidths |
| DE10012872C1 (en) * | 2000-03-16 | 2001-08-09 | Infineon Technologies Ag | Electronic component with capacitance diodes, use of the component in a receiving unit and circuit arrangement with the component (e.g. three-band television tuner) |
| US6678512B1 (en) * | 2000-04-14 | 2004-01-13 | Lucent Technologies Inc. | Receiver system using analog to digital conversion at radio frequency and method |
| US7685622B2 (en) * | 2001-11-01 | 2010-03-23 | Thomson Licensing | Television signal receiver system |
| US7302237B2 (en) * | 2002-07-23 | 2007-11-27 | Mercury Computer Systems, Inc. | Wideband signal generators, measurement devices, methods of signal generation, and methods of signal analysis |
| US7483711B2 (en) | 2002-10-24 | 2009-01-27 | Bbn Technologies Corp | Spectrum-adaptive networking |
| JP2005203935A (en) * | 2004-01-14 | 2005-07-28 | Matsushita Electric Ind Co Ltd | Tuner apparatus and integrated circuit used therefor |
| JP2006217127A (en) * | 2005-02-02 | 2006-08-17 | Matsushita Electric Ind Co Ltd | Receiving device |
| JP2007036445A (en) * | 2005-07-25 | 2007-02-08 | Sharp Corp | Television tuner |
| WO2007135639A1 (en) * | 2006-05-18 | 2007-11-29 | Koninklijke Philips Electronics N.V. | System and method for detecting temporarily unused bandwidth in the rf spectrum |
| US7830456B1 (en) * | 2006-06-02 | 2010-11-09 | Anadigics, Inc | System and method for frequency multiplexing in double-conversion receivers |
| JP2008054226A (en) * | 2006-08-28 | 2008-03-06 | Shibatekku Kk | Receiving apparatus |
| US8237509B2 (en) | 2007-02-23 | 2012-08-07 | Qualcomm, Incorporated | Amplifier with integrated filter |
| US8515473B2 (en) | 2007-03-08 | 2013-08-20 | Bae Systems Information And Electronic Systems Integration Inc. | Cognitive radio methodology, physical layer policies and machine learning |
| US20080291985A1 (en) * | 2007-05-23 | 2008-11-27 | Nikhil Adnani | Agile spectrum monitoring in a radio transceiver |
| JP4673869B2 (en) * | 2007-06-11 | 2011-04-20 | 日本電信電話株式会社 | Transceiver and communication method thereof |
| US20090180403A1 (en) | 2008-01-11 | 2009-07-16 | Bogdan Tudosoiu | Multi-band and multi-mode radio frequency front-end module architecture |
| WO2009103348A1 (en) | 2008-02-22 | 2009-08-27 | Telefonaktiebolaget Lm Ericsson (Publ) | Pin-diode linearized automatic gain control circuits |
| US8145172B2 (en) * | 2008-11-25 | 2012-03-27 | Silicon Laboratories Inc. | Low-cost receiver using tracking filter |
-
2009
- 2009-09-30 US US12/571,153 patent/US8350970B2/en active Active
-
2010
- 2010-09-29 JP JP2012531190A patent/JP5770735B2/en not_active Expired - Fee Related
- 2010-09-29 CN CN201080037667.9A patent/CN102577357B/en not_active Expired - Fee Related
- 2010-09-29 KR KR1020127004727A patent/KR20120090946A/en not_active Application Discontinuation
- 2010-09-29 EP EP10819763.3A patent/EP2484108A4/en not_active Withdrawn
- 2010-09-29 WO PCT/CA2010/001515 patent/WO2011038484A1/en active Application Filing
- 2010-09-29 TW TW099133011A patent/TW201136303A/en unknown
-
2012
- 2012-11-08 HK HK12111273.1A patent/HK1170615A1/en not_active IP Right Cessation
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006127983A2 (en) * | 2005-05-26 | 2006-11-30 | Pause-Tv, Inc. | Digital television signal reception |
| WO2008049114A1 (en) * | 2006-10-19 | 2008-04-24 | Maxlinear, Inc. | Low complexity diversity receiver |
| CN201039094Y (en) * | 2007-05-21 | 2008-03-19 | 杭州中科微电子有限公司 | A high-gain RF low-noise amplifier |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105007085A (en) * | 2014-04-15 | 2015-10-28 | 联发科技股份有限公司 | Receiver apparatus and associated blocker detection method |
| CN105007085B (en) * | 2014-04-15 | 2017-08-29 | 联发科技股份有限公司 | Acceptor device and related interception detection method |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2484108A4 (en) | 2014-01-22 |
| HK1170615A1 (en) | 2013-04-19 |
| US20110075048A1 (en) | 2011-03-31 |
| KR20120090946A (en) | 2012-08-17 |
| JP5770735B2 (en) | 2015-08-26 |
| WO2011038484A1 (en) | 2011-04-07 |
| JP2013506350A (en) | 2013-02-21 |
| TW201136303A (en) | 2011-10-16 |
| EP2484108A1 (en) | 2012-08-08 |
| CN102577357B (en) | 2014-12-31 |
| US8350970B2 (en) | 2013-01-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102577357B (en) | Radio frequency front end and spectrum sensor | |
| US8976302B2 (en) | Radio frequency front end for television band receiver and spectrum sensor | |
| CN1536761B (en) | Tuner | |
| US20110294452A1 (en) | Antenna amplifier device and antenna device provided in mobile object | |
| CN100385929C (en) | Satellite signal receiving system | |
| EP2112762A1 (en) | Antenna matching unit and high-frequency receiving unit including the same | |
| CN102291157B (en) | Multi-system channel multiplex circuit | |
| US4363135A (en) | Four band VHF varactor tuner | |
| KR101040256B1 (en) | System and method for finding direction of signal with improved direction finding accuracy | |
| RU2555862C2 (en) | Method for direct signal sampling of multiple radio frequency bands and control unit therefor | |
| CN101651485A (en) | Method for reducing intermodulation interference and signal receiver used by same | |
| US7738847B2 (en) | Automatic gain control for a tuner | |
| CN103684568B (en) | Reception system | |
| DE102010043367A1 (en) | HD radio diversity receiver with common processing paths | |
| EP1056221A2 (en) | Integrated receiving system for receiving a plurality of media signals and corresponding signal reception processing method | |
| CN100411315C (en) | High frequency receiving device | |
| CN1069007C (en) | Broadboard low-noise low intermodulation distortion receiver | |
| US8099071B2 (en) | Direct conversion pre-ADC frequency mixer | |
| CA2810231A1 (en) | Radio frequency front end for television band receiver and spectrum sensors | |
| RU2563028C2 (en) | Method and device of generating at least one output signal | |
| EP1895694A2 (en) | Receiving Apparatus | |
| JPH03254225A (en) | Diversity receiver for automobile | |
| MXPA00011640A (en) | Apparatus and method for processing signals selected from multiple data streams | |
| AU2916402A (en) | Apparatus and method for processing signals selected from multiple data streams |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| REG | Reference to a national code |
Ref country code: HK Ref legal event code: DE Ref document number: 1170615 Country of ref document: HK |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| REG | Reference to a national code |
Ref country code: HK Ref legal event code: GR Ref document number: 1170615 Country of ref document: HK |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141231 Termination date: 20160929 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |